中文摘要：

采用高温固相法制备了Sr1-xAl2Si2O8：Eu^3＋x,Li＋0.03系列红色荧光粉,研究了试样的晶体结构和发光性质。合成的试样均为纯相的SrAl2Si2O8晶体,单斜晶系,空间群为C2/m（12）;Eu^3＋和Li＋进入基质晶体中,使得SrAl2Si2O8晶胞参数a、b和c略微减小,只引起了晶体结构轻微的畸变。试样的激发光谱由位于220-580nm波长的一个宽激发带和一组锐线峰构成,其中395nm波长处Eu^3＋的7F0→^5L6激发峰的强度最强。发射光谱位于550-750nm波长范围内呈现多条锐线发射,其中595nm和615nm波长处发射峰最强,分别归属于Eu^3＋的^5D0→^7F1磁偶极跃迁和5D0→^7F2电偶极跃迁。研究了Eu^3＋浓度对荧光粉发光性能的影响,结果表明,随着Eu^3＋浓度的增加,发光强度先增加后减小,最佳掺杂量为0.03,而对试样的色坐标几乎没有影响;该系列荧光粉浓度淬灭机理为电偶极–电偶极（d-d）相互作用。

英文摘要：

A series of red phosphors Sr1-xAl2Si2O8：Eu^3＋x,Li＋0.03 were prepared by high temperature solidstate reaction.Structure and luminescence properties of the Sr1-xAl2Si2O8：Eu^3＋x,Li＋0.03 are studied.The samples are a pure phase of SrAl2Si2O8,and they belong to monoclinic system and C2/m（12）space group.Eu^3＋and Li＋into the crystal matrix,which makes the lattice parameters（a,b,c）of the SrAl2Si2O8 slightly decrease,only causes a slight distortion of the crystal structure.The excitation spectra are composed of a broad excitation band located at 220-580 nm and a group of sharp peaks,and the strongest peak is 395nm（7F0→5L6）.The emission spectra are located at 550-750 nm,and present a number of sharp emission lines.The emission peak at 595 nm is attributed to 5D0→7F1 magnetic dipole transition of the Eu^3＋,while the peak at 615 nm is due to 5D0→7F2electric dipole transition of the Eu^3＋.The effect of the doping concentration of Eu^3＋is investigated.The results show that the luminescent intensity firstly increases and then decreases with the increase of Eu^3＋concentration,and reaches the maximal value at Eu^3＋concentration of 0.03 in mole.The color coordinates of samples are almost with no change.The mechanism of concentration quenching is due to the dipole-dipole interaction.